Using data collected by three of NASA's high-tech aerosol monitoring satellites, Israeli scientists have tracked pollution trends for 189 megacities, including New York City, Tokyo and Mumbai. Called MODIS-Terra, MODIS-Aqua, and MISR, the satellites were launched by NASA from 2000 through 2002. Their combined data constitute an accurate survey of aerosol concentrations a few hundred metres above the Earth. Fifty-eight of these megacities have populations ...For a Free Step By Step Guide for Dating Dos and Don'ts check http://end2endwebs.com
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